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      1 /***************************************************************************
      2  *                                  _   _ ____  _
      3  *  Project                     ___| | | |  _ \| |
      4  *                             / __| | | | |_) | |
      5  *                            | (__| |_| |  _ <| |___
      6  *                             \___|\___/|_| \_\_____|
      7  *
      8  * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel (at) haxx.se>, et al.
      9  *
     10  * This software is licensed as described in the file COPYING, which
     11  * you should have received as part of this distribution. The terms
     12  * are also available at http://curl.haxx.se/docs/copyright.html.
     13  *
     14  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
     15  * copies of the Software, and permit persons to whom the Software is
     16  * furnished to do so, under the terms of the COPYING file.
     17  *
     18  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
     19  * KIND, either express or implied.
     20  *
     21  ***************************************************************************/
     22 #include "tool_setup.h"
     23 
     24 #define ENABLE_CURLX_PRINTF
     25 /* use our own printf() functions */
     26 #include "curlx.h"
     27 
     28 #include "tool_cfgable.h"
     29 #include "tool_msgs.h"
     30 
     31 #include "memdebug.h" /* keep this as LAST include */
     32 
     33 #define WARN_PREFIX "Warning: "
     34 #define WARN_TEXTWIDTH (79 - (int)strlen(WARN_PREFIX))
     35 
     36 /*
     37  * Emit warning formatted message on configured 'errors' stream unless
     38  * mute (--silent) was selected.
     39  */
     40 
     41 void warnf(struct GlobalConfig *config, const char *fmt, ...)
     42 {
     43   if(!config->mute) {
     44     va_list ap;
     45     int len;
     46     char *ptr;
     47     char print_buffer[256];
     48 
     49     va_start(ap, fmt);
     50     len = vsnprintf(print_buffer, sizeof(print_buffer), fmt, ap);
     51     va_end(ap);
     52 
     53     ptr = print_buffer;
     54     while(len > 0) {
     55       fputs(WARN_PREFIX, config->errors);
     56 
     57       if(len > (int)WARN_TEXTWIDTH) {
     58         int cut = WARN_TEXTWIDTH-1;
     59 
     60         while(!ISSPACE(ptr[cut]) && cut) {
     61           cut--;
     62         }
     63         if(0 == cut)
     64           /* not a single cutting position was found, just cut it at the
     65              max text width then! */
     66           cut = WARN_TEXTWIDTH-1;
     67 
     68         (void)fwrite(ptr, cut + 1, 1, config->errors);
     69         fputs("\n", config->errors);
     70         ptr += cut+1; /* skip the space too */
     71         len -= cut;
     72       }
     73       else {
     74         fputs(ptr, config->errors);
     75         len = 0;
     76       }
     77     }
     78   }
     79 }
     80 
     81 /*
     82  * Emit help formatted message on given stream.
     83  */
     84 
     85 void helpf(FILE *errors, const char *fmt, ...)
     86 {
     87   va_list ap;
     88   if(fmt) {
     89     va_start(ap, fmt);
     90     fputs("curl: ", errors); /* prefix it */
     91     vfprintf(errors, fmt, ap);
     92     va_end(ap);
     93   }
     94   fprintf(errors, "curl: try 'curl --help' "
     95 #ifdef USE_MANUAL
     96           "or 'curl --manual' "
     97 #endif
     98           "for more information\n");
     99 }
    100 
    101